We told you that Netflix was adding Watch Instantly support for Macs using Microsoft Silverlight earlier this week, but now the official Netflix blog details how to enable the new Silverlight player on your account whether you're a Mac or Windows user. Just follow the opt-in link to get started with the Silverlight player. The catch: Once you enable Silverlight on your account, it sounds as though you can't go back to the old Windows Media streaming. That might deter you for a couple of reasons. First, not all movies are available for streaming with Silverlight, and it's still a touch buggy. More importantly for me is that the Silverlight switch would break my Xbox 360 as streaming Netflix player (at least until the fall Xbox update). If you give it a try, let's hear how you like it in the comments. Thanks Joe!